I passed in first seat (if you don't agree you I didn't have ♣J
RHO overcalled 2♦. I was thinking about pass but vul against not 2♦x doesn't seem to be a winner.
2♠ is a big underbid but if partner has subminimum opening we can be too high after 2NT(3♦).
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My idea is to play double here as normal takeout or drury type hand.
If parner bids 2♥, my 2♠ show 9-11 and 3card support. With 4 spades I would bid normal 2NT(3♦).
If partner bids 2♠ I can pass (dbl. already showed some values) or bid 3♠ if my hand is really nice (or I can use also other 3level bids to be more precise).
I can see three disadvantages:
-It doesn't show a fit immediatly. It can be critical, when opps preemt. But the fit is only 3card so it tends to show balanced hand.
-1♠-(2♣)-dbl-(p) / 2♦ - (p) - ? and 2-4-3-4 hand. You must bid 2♥ (which normaly shows 5bad heards) because 2♠ is drury type hand.
-it can't be used after 1♥ opening so the agreements become a little bit nonsymetric
What do you think about it?

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